Trinity Centre for the Environmenthttp://hdl.handle.net/2262/76836
Mon, 21 Jan 2019 21:41:35 GMT2019-01-21T21:41:35ZInfluence of catchment characteristics on the relationship between land use and lake water quality in County Clarehttp://hdl.handle.net/2262/78655
Influence of catchment characteristics on the relationship between land use and lake water quality in County Clare
Wemaëre, Alice
This research aims to identify the impacts of varying land use and physical environments on lake water quality based on an extensive study of sixty-nine catchments in County Clare, Ireland, combined with a more detailed study of a single catchment. Between March 2000 and October 2001, a comprehensive monitoring of sixty-nine lakes was carried out in County Clare, Data on catchment characteristics (topography, slope, soil characteristics, hydrology, forestry, agricultural land use and human activities) were compiled and spatially analysed using a Geographic Information System (GIS) Two main types of landscape were identified among the catchments. Calcareous catchments, with permeable carboniferous limestone bedrock, were associated with lower elevation and well/moderately-drained soils, such as brown earths, rendzinas and grey-brown podzolics, while acidic catchments had impermeable shale bedrock and poorly drained soils, such as peats and gleys. Calcareous catchments usually had greater drainage areas and were associated with lakes of greater surface areas, volumes and shorelines than acidic catchments. Land use distribution among the catchments reflected the influence of the physical environment, with greater coverage of pasture and broadleaf forests observed in calcareous catchments, while peatlands and coniferous forests were associated with acidic catchments.
Sat, 01 Jan 2005 00:00:00 GMThttp://hdl.handle.net/2262/786552005-01-01T00:00:00ZSources of nitrate leached to groundwater in grasslands of Fermoy, Co. Corkhttp://hdl.handle.net/2262/78607
Sources of nitrate leached to groundwater in grasslands of Fermoy, Co. Cork
Richards, Karl
Groundwater contamination with nitrate from agriculture in Ireland has mainly been attributed to specific point sources such as farmyards or to arable farming in certain areas of the country. The current study aimed to investigate the cause of high groundwater nitrate concentrations beneath an intensive dairy farm and to quantify the amount of nitrogen leaching through the unsaturated soil and Quaternary deposits. The study farm was located on a free draining sandstone soil which overlied a limestone bedrock aquifer. The results from the study farm were extrapolated to a regional level to determine if high groundwater nitrate concentrations might be expected in other areas with similar agricultural and geological/hydrogeological properties. A detailed nitrogen budget for the dairy farm was calculated which examined numerous nitrogen sources on the farm. On a plot by plot basis extremely high rates of nitrogen application/recycling could be observed up to 805 kg N per hectare. Annual soil organic nitrogen mineralisation was equivalent to the inorganic fertiliser nitrogen input on the farm, varying from 158 to 346 kg N per hectare.
Sat, 01 Jan 2000 00:00:00 GMThttp://hdl.handle.net/2262/786072000-01-01T00:00:00ZAn integrated approach to water quality management for agricultural catchments in Irelandhttp://hdl.handle.net/2262/77164
An integrated approach to water quality management for agricultural catchments in Ireland
Harris, Maryann D.
Thu, 01 Jan 1998 00:00:00 GMThttp://hdl.handle.net/2262/771641998-01-01T00:00:00Z